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Scintillation and anomalous emission in elpasolite Cs2LiLuCl6:Ce3+
- Source :
- Journal of Luminescence, Journal of Luminescence, Elsevier, 2006, 117 (2), pp.187-198. ⟨10.1016/j.jlumin.2005.05.005⟩
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- The luminescence and scintillation properties of Cs 2 LiLuCl 6 :0.5%Ce 3+ are presented. Special attention is devoted to a 9.4 ns fast emission at 275 nm that can only be excited via the highest cubic field 5d e state of Ce. Contrary to Cs 3 LuCl 6 and Cs 2 LiYCl 6 , where the same type of fast emission was observed, the emission in Cs 2 LiLuCl 6 is still observed at room temperature. Assuming that the 5d e state is located inside the host conduction band (CB), we propose that the emission originates from a mixed state at or just below the bottom of the CB and ends at the 4f ground state of Ce 3+ . To proof this model we studied the thermal quenching of the anomalous luminescence and performed X-ray photoelectron spectroscopy. A model for a temperature-activated energy transfer from the anomalous state to the lowest 5d t excited state of Ce 3+ explains most of the results. Besides the 275 nm emission, the material shows 5d t –4f Ce 3+ emission at 370 and 406 nm and 2 ns fast core-valence luminescence when excited with 16–22 eV photons. The scintillation properties of Cs 2 LiLuCl 6 :Ce are briefly discussed.
- Subjects :
- [PHYS]Physics [physics]
Scintillation
Photon
Photoluminescence
Quenching (fluorescence)
Chemistry
Biophysics
02 engineering and technology
General Chemistry
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Biochemistry
Atomic and Molecular Physics, and Optics
0104 chemical sciences
X-ray photoelectron spectroscopy
Excited state
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
Atomic physics
0210 nano-technology
Ground state
Luminescence
ComputingMilieux_MISCELLANEOUS
Subjects
Details
- ISSN :
- 00222313 and 18727883
- Volume :
- 117
- Database :
- OpenAIRE
- Journal :
- Journal of Luminescence
- Accession number :
- edsair.doi.dedup.....60c49336bbc93d3037b6c0d47de30b6b